Carrier oils, also known as fixed oils, are natural oils derived from seeds, beans, and kernels. They are extracted through pressing, heat, and sometimes chemically. Also called base oils, they're used in forming a base oil for essential oils, for healing, cosmetics, creams, and lotions.
Most carrier or fixed oils have little to no aroma and are liquid at room temperature. They are nonvolitile and do not evaporate at room temperature. Some common fixed oils are, almond, apricot, avocado, borage seed, carrot seed, cocoa butter, coconut, evening primrose, and grapeseed oil, among many others.
The purpose of carrier oils is to form a base to carry the essential oils used in healing andaromatherapy in balanced amounts and parts to baths, sprays, inhalers, and compresses, to benefit hair, mind, skin, and internal organs through external massage, in a therapuetic manner.